Abstract

Waveguides were fabricated in a 5 mm long $\mathrm{Pr}(0.5\text{at}\%)\text{:}{\mathrm{LiYF}}_4$ (YLF) crystal with a femtosecond Ti:sapphire laser system. Waveguiding was achieved inside a core surrounded by eight single modified tracks building a rhombic structure. The waveguide was pumped at a wavelength of 444 nm with an InGaN laser diode. Orange and deep red laser oscillation were realized. Maximum output powers of 25 mW at 604 nm and 12 mW at 720 nm with respect to the incident pump power were achieved.

© 2012 Optical Society of America

Red and orange Pr³⁺:LiYF₄ planar waveguide laser

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